--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.layer0.utils.binaryPredicates;\r
+\r
+import java.util.Arrays;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashSet;\r
+import java.util.Iterator;\r
+import java.util.Set;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.utils.datastructures.Pair;\r
+\r
+public class UnionPredicate extends BinaryPredicate {\r
+\r
+ Collection<IBinaryPredicate> predicates;\r
+\r
+ public UnionPredicate(Collection<IBinaryPredicate> predicates) {\r
+ this.predicates = predicates;\r
+ }\r
+ \r
+ public UnionPredicate(IBinaryPredicate ... predicates) {\r
+ this(Arrays.asList(predicates));\r
+ }\r
+\r
+ @Override\r
+ public Collection<Resource> getObjects(ReadGraph g, Resource subject) throws DatabaseException {\r
+ Iterator<IBinaryPredicate> it = predicates.iterator();\r
+ \r
+ while(it.hasNext()) {\r
+ Collection<Resource> result = it.next().getObjects(g, subject);\r
+ if(!result.isEmpty()) {\r
+ while(it.hasNext()) {\r
+ Collection<Resource> temp = it.next().getObjects(g, subject);\r
+ if(!temp.isEmpty()) {\r
+ Set<Resource> merged = new HashSet<Resource>(result.size() + temp.size());\r
+ merged.addAll(result);\r
+ merged.addAll(temp);\r
+ while(it.hasNext())\r
+ merged.addAll(it.next().getObjects(g, subject));\r
+ return merged;\r
+ }\r
+ }\r
+ return result;\r
+ }\r
+ }\r
+ return Collections.emptyList();\r
+ }\r
+\r
+ @Override\r
+ public Collection<Pair<Resource, Resource>> getStatements(ReadGraph g) throws DatabaseException {\r
+ Iterator<IBinaryPredicate> it = predicates.iterator();\r
+ \r
+ while(it.hasNext()) {\r
+ Collection<Pair<Resource, Resource>> result = it.next().getStatements(g);\r
+ if(!result.isEmpty()) {\r
+ while(it.hasNext()) {\r
+ Collection<Pair<Resource, Resource>> temp = it.next().getStatements(g);\r
+ if(!temp.isEmpty()) {\r
+ Set<Pair<Resource, Resource>> merged = new HashSet<Pair<Resource, Resource>>(result.size() + temp.size());\r
+ merged.addAll(result);\r
+ merged.addAll(temp);\r
+ while(it.hasNext())\r
+ merged.addAll(it.next().getStatements(g));\r
+ return merged;\r
+ }\r
+ }\r
+ return result;\r
+ }\r
+ }\r
+ return Collections.emptyList();\r
+ }\r
+\r
+ @Override\r
+ public Collection<Resource> getSubjects(ReadGraph g, Resource object) throws DatabaseException {\r
+ Iterator<IBinaryPredicate> it = predicates.iterator();\r
+ \r
+ while(it.hasNext()) {\r
+ Collection<Resource> result = it.next().getSubjects(g, object);\r
+ if(!result.isEmpty()) {\r
+ while(it.hasNext()) {\r
+ Collection<Resource> temp = it.next().getSubjects(g, object);\r
+ if(!temp.isEmpty()) {\r
+ Set<Resource> merged = new HashSet<Resource>(result.size() + temp.size());\r
+ merged.addAll(result);\r
+ merged.addAll(temp);\r
+ while(it.hasNext())\r
+ merged.addAll(it.next().getSubjects(g, object));\r
+ return merged;\r
+ }\r
+ }\r
+ return result;\r
+ }\r
+ }\r
+ return Collections.emptyList();\r
+ }\r
+\r
+ @Override\r
+ public boolean has(ReadGraph g, Resource subject, Resource object) throws DatabaseException {\r
+ for(IBinaryPredicate pred : predicates)\r
+ if(pred.has(g, subject, object))\r
+ return true;\r
+ return false;\r
+ }\r
+\r
+ @Override\r
+ public boolean supportsGetObjects() {\r
+ for(IBinaryPredicate pred : predicates)\r
+ if(!pred.supportsGetObjects())\r
+ return false;\r
+ return true;\r
+ }\r
+\r
+ @Override\r
+ public boolean supportsGetStatements() {\r
+ for(IBinaryPredicate pred : predicates)\r
+ if(!pred.supportsGetStatements())\r
+ return false;\r
+ return true;\r
+ }\r
+\r
+ @Override\r
+ public boolean supportsGetSubjects() {\r
+ for(IBinaryPredicate pred : predicates)\r
+ if(!pred.supportsGetSubjects())\r
+ return false;\r
+ return true;\r
+ }\r
+\r
+ @Override\r
+ public void add(WriteGraph g, Resource subject, Resource object) {\r
+ throw new UnsupportedOperationException();\r
+ }\r
+\r
+ @Override\r
+ public void remove(WriteGraph g, Resource subject, Resource object) {\r
+ throw new UnsupportedOperationException();\r
+ }\r
+\r
+ @Override\r
+ public boolean supportsAdditions() {\r
+ return false;\r
+ }\r
+\r
+ @Override\r
+ public boolean supportsRemovals() {\r
+ return false;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ final int prime = 31;\r
+ int result = 1;\r
+ result = prime * result\r
+ + ((predicates == null) ? 0 : predicates.hashCode());\r
+ return result;\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object obj) {\r
+ if (this == obj)\r
+ return true;\r
+ if (obj == null)\r
+ return false;\r
+ if (getClass() != obj.getClass())\r
+ return false;\r
+ UnionPredicate other = (UnionPredicate) obj;\r
+ if (predicates == null) {\r
+ if (other.predicates != null)\r
+ return false;\r
+ } else if (!predicates.equals(other.predicates))\r
+ return false;\r
+ return true;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff